Mechanism of the CO oxidation reaction on O-precovered Pt(111) surfaces studied with near-edge x-ray absorption fine structure spectroscopy.
J Chem Phys
; 122(13): 134709, 2005 Apr 01.
Article
de En
| MEDLINE
| ID: mdl-15847491
ABSTRACT
The mechanism of CO oxidation reaction on oxygen-precovered Pt(111) surfaces has been studied by using time-resolved near-edge x-ray absorption fine structure spectroscopy. The whole reaction process is composed of two distinct paths (1) a reaction of isolated oxygen atoms with adsorbed CO, and (2) a reaction of island-periphery oxygen atoms after the CO saturation. CO coadsorption plays a role to induce the dynamic change in spatial distribution of O atoms, which switches over the two reaction paths. These mechanisms were confirmed by kinetic Monte Carlo simulations. The effect of coadsorbed water in the reaction mechanism was also examined.
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Collection:
01-internacional
Base de données:
MEDLINE
Langue:
En
Journal:
J Chem Phys
Année:
2005
Type de document:
Article
Pays d'affiliation:
Japon